$ make
cp SimpleServer.pm blib/lib/Net/Z3950/SimpleServer.pm
AutoSplitting blib/lib/Net/Z3950/SimpleServer.pm (blib/lib/auto/Net/Z3
+950/SimpleServer)
cp logging-server.pl blib/lib/Net/Z3950/logging-server.pl
cp grs_test.pl blib/lib/Net/Z3950/grs_test.pl
cp OID.pm blib/lib/Net/Z3950/OID.pm
cp GRS1.pm blib/lib/Net/Z3950/GRS1.pm
cp ztest.pl blib/lib/Net/Z3950/ztest.pl
Running Mkbootstrap for SimpleServer ()
chmod 644 "SimpleServer.bs"
"/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- SimpleServ
+er.bs blib/arch/auto/Net/Z3950/SimpleServer/SimpleServer.bs 644
"/usr/bin/perl" "/System/Library/Perl/5.30/ExtUtils/xsubpp"  -typemap 
+'/System/Library/Perl/5.30/ExtUtils/typemap'  SimpleServer.xs > Simpl
+eServer.xsc
mv SimpleServer.xsc SimpleServer.c
cc -c  -I/usr/local/Cellar/yaz/5.34.0_2/include -DYAZ_POSIX_THREADS=1 
+-DYAZ_HAVE_XML2=1 -DYAZ_HAVE_XSLT=1 -DYAZ_HAVE_EXSLT=1 -g -pipe -DPER
+L_USE_SAFE_PUTENV -Os   -DVERSION=\"1.28\" -DXS_VERSION=\"1.28\"  -iw
+ithsysroot "/System/Library/Perl/5.30/darwin-thread-multi-2level/CORE
+"   SimpleServer.c
rm -f blib/arch/auto/Net/Z3950/SimpleServer/SimpleServer.bundle
LD_RUN_PATH="/usr/local/Cellar/yaz/5.34.0_2/lib" cc  -bundle -undefine
+d dynamic_lookup  SimpleServer.o  -o blib/arch/auto/Net/Z3950/SimpleS
+erver/SimpleServer.bundle  \
       -L/usr/local/Cellar/yaz/5.34.0_2/lib -lyaz_server -lyaz   \
      
ld: warning: -undefined dynamic_lookup may not work with chained fixup
+s
chmod 755 blib/arch/auto/Net/Z3950/SimpleServer/SimpleServer.bundle
Manifying 2 pod documents
[download]

And after that, we come to the real problem, which manifests during make test (and which you can see is again to do with the linker):

$ make test
"/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- SimpleServ
+er.bs blib/arch/auto/Net/Z3950/SimpleServer/SimpleServer.bs 644
PERL_DL_NONLAZY=1 "/usr/bin/perl" "-Iblib/lib" "-Iblib/arch" test.pl
1..4
Can't load 'blib/arch/auto/Net/Z3950/SimpleServer/SimpleServer.bundle'
+ for module Net::Z3950::SimpleServer: dlopen(blib/arch/auto/Net/Z3950
+/SimpleServer/SimpleServer.bundle, 0x0002): tried: 'blib/arch/auto/Ne
+t/Z3950/SimpleServer/SimpleServer.bundle' (relative path not allowed 
+in hardened program) at /System/Library/Perl/5.30/darwin-thread-multi
+-2level/DynaLoader.pm line 197.
� at test.pl line 11.
Compilation failed in require at test.pl line 11.
BEGIN failed--compilation aborted at test.pl line 11.
not ok 1
make: *** [test_dynamic] Error 2
[download]

That "relative path not allowed" actually prevents the tests from running, and my real question is, why is this a hardened program at all? My favoured solution would be to not have the program hardened while I'm working on it!

Anyway: I can force this to work my modifying the Makefile.PL to use an absolute path for the ARCHLIB:

sub MY::postamble { 'INST_ARCHLIB = `pwd`/blib/arch' }
[download]

which makes the -I argument absolute. Then the tests run OK (which proves that the "mostly harmless" warnings really were mostly harmless: the necessary libraries were loaded OK for the tests.)

But that "solution" is no good, not only because it's horribly inelegant and knows too much about what ExtUtils::MakeMaker is doing, but more significantly because it prevents make install from working.

This general situation (getting a Perl distro to successfully link and run with -lxml2) is addressed by Alien::Libxml2, as used by XML::LibXML, which has plenty of passes on MacOS. In your situation I would move my distro over to using that scheme of things and copy exactly what XML::LibXML does.